744564381 has 32 divisors (see below), whose sum is σ = 1142553600. Its totient is φ = 426545280.

The previous prime is 744564377. The next prime is 744564383. The reversal of 744564381 is 183465447.

It is not a de Polignac number, because 744564381 - 2² = 744564377 is a prime.

It is a super-2 number, since 2×744564381² = 1108752234907826322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (744564383) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355720 + ... + 357806.

It is an arithmetic number, because the mean of its divisors is an integer number (35704800).

Almost surely, 2^744564381 is an apocalyptic number.

It is an amenable number.

744564381 is a deficient number, since it is larger than the sum of its proper divisors (397989219).

744564381 is a wasteful number, since it uses less digits than its factorization.

744564381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689.

The product of its digits is 322560, while the sum is 42.

The square root of 744564381 is about 27286.7070384097. The cubic root of 744564381 is about 906.3600445616.

The spelling of 744564381 in words is "seven hundred forty-four million, five hundred sixty-four thousand, three hundred eighty-one".